01
What is the V-model?
Show answer
A development model where each development phase has a matching testing phase, such as requirements with acceptance tests and design with integration tests.
Software Testing Interview Questions in Delhi
36 practice questions with answers for Software Testing interviews in Delhi.
Software Testing jobs in Delhi
Delhi NCR has one of India's biggest pools of IT, consulting, banking and start-up jobs. Delhi itself hosts many corporate, government-tech and consulting offices, and most candidates also apply across Noida and Gurgaon, so interviews here mix service-company and product-company styles.
Below are 36 questions that match the mix of service, product and domain employers hiring software testers in Delhi.
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02
How do you convert existing manual test cases into automated scripts?
Show answer
Pick a small set of stable, high-value regression cases first. Review each one: make steps precise, remove judgement-based checks and define clear expected results. Prepare test data that the script can create and clean up. Build reusable page objects and helpers for common steps like login. Automate, run several times to confirm stability, then link each script to its manual case ID and mark the manual case as automated.
03
What goes into a test plan?
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Scope (in and out), objectives, approach, environments, schedule, roles, entry/exit criteria, risks and mitigation, deliverables and tools.
04
What is a test oracle?
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A test oracle is the source you use to decide whether a test result is correct, that is, the expected result. It can be a requirement document, a user story, an older version of the system, a calculation in a spreadsheet, a domain expert or common sense. For example, when testing a tax calculator, the official tax slab table is the oracle. Without a reliable oracle, you cannot say a test passed or failed.
05
What is contract testing?
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Contract testing checks that a service provider and its consumers agree on the API format, such as request fields, response fields and status codes, without running a full end-to-end environment. The consumer defines what it expects, and the provider's build verifies it still meets that contract. It catches breaking changes early in microservice systems, where full integration environments are slow and fragile.
06
What is the role of a manual tester in a software team?
Show answer
A manual tester understands requirements, writes test scenarios and test cases, prepares test data, executes tests on each build, logs clear bug reports and retests fixes. They also do exploratory testing, join stand-ups and reviews, and give a quality status before release. Beyond finding bugs, a good manual tester represents the end user and raises usability or requirement gaps early, when they are cheap to fix.
07
Which basic Git commands should a manual tester learn before working on automation?
Show answer
Start with: git clone to copy the test repository; git pull to get the latest changes; git checkout -b feature/login-tests to create a branch; git status and git diff to see changes; git add and git commit -m to save work with a message; and git push to send the branch so you can raise a pull request for review. Also learn to resolve simple merge conflicts and never commit passwords.
08
What is defect density?
Show answer
The number of defects per size of software, for example defects per thousand lines of code or per module, used to compare quality.
09
Explain SQL joins briefly.
Show answer
INNER returns matching rows, LEFT keeps all left rows, RIGHT keeps all right rows and FULL keeps all rows from both tables.
10
How do you test a country dropdown that controls a dependent state dropdown?
Show answer
Check the state list is empty or disabled until a country is selected. Select a country and verify the correct states load. Change the country and confirm the old state selection is cleared and the new list loads. Test countries with no states, a long list with scrolling and search, and default values on page load. Submit the form and verify the saved values, then reload and check both dropdowns keep the saved selection.
11
What is integration testing and what are its approaches?
Show answer
Integration testing checks that modules or services work correctly together, focusing on interfaces and data flow. Approaches: big bang, where all modules are combined at once and testing is simple to plan but defects are hard to locate; top-down, where high-level modules are tested first using stubs for lower ones; bottom-up, using drivers for higher ones; and sandwich, which mixes both. Incremental approaches make it easier to find which interface failed.
12
What is defect leakage?
Show answer
Defects found after release that testing should have caught; leakage % = defects in production / total defects x 100.
13
What is error guessing?
Show answer
Using experience to guess where defects likely hide, such as empty fields, special characters or unexpected sequences, and designing tests for them.
14
SQL: find duplicate emails.
Show answer
SELECT email, COUNT(*)
FROM users
GROUP BY email
HAVING COUNT(*) > 1;
15
What is regression testing, and when do you automate it?
Show answer
Re-testing existing features after a change. Automate stable, repetitive, high-value flows that run every release.
16
What are positive and negative test cases?
Show answer
Positive cases use valid inputs to confirm expected behaviour; negative cases use invalid inputs to confirm the system handles errors gracefully.
17
What is a performance baseline?
Show answer
A performance baseline is a set of measurements of the current system under a known load, such as response times, throughput, error rate and resource usage. Every new build or release is compared with it to spot regressions. For example, if the checkout API had p95 of 800 milliseconds at 200 users last release and now shows 1.5 seconds, the change needs investigation. A benchmark compares against an industry or competitor standard.
18
A report shows duplicate rows after a new release. How do you investigate in the database?
Show answer
Run the report query with GROUP BY on the business key and HAVING COUNT(*) > 1 to find which records repeat. Then check whether the duplicates exist in the base table or are created by the query, usually a new join to a one-to-many table such as addresses. Compare the query before and after the release. Include the duplicate keys, the count and the suspected join in the bug report.
19
What are severity and priority? Give examples.
Show answer
Severity is impact on the system; priority is urgency of the fix. A crash in a rare report is high severity, low priority; a spelling mistake in the logo is low severity, high priority.
20
How do you chain requests in Postman by passing a token from login to the next call?
Show answer
// Tests tab of the Login request
const body = pm.response.json();
pm.environment.set('authToken', body.token);
// Next request header:
// Authorization: Bearer {{authToken}}
// Postman replaces {{authToken}} with the saved value
21
How do you capture logs from an Android device for a bug report?
Show answer
Enable developer options and USB debugging, connect the phone and confirm it is visible with adb devices. Clear old logs with adb logcat -c, reproduce the bug, then save logs with adb logcat -d > crash_log.txt, filtering by the app package or error level if needed. For a crash, search for FATAL EXCEPTION. Attach the log, device model, OS version, app version and a screen recording to the bug.
22
Write test cases for a signup form.
Show answer
Mandatory fields, email format, password rules, duplicate email, terms checkbox, captcha, confirmation email and field length limits.
23
How do specification-based techniques differ from experience-based techniques?
Show answer
Specification-based (black box) techniques derive tests systematically from requirements: equivalence partitioning, boundary values, decision tables, state transitions and use cases. They give measurable coverage. Experience-based techniques rely on the tester's knowledge and intuition: error guessing, exploratory testing and checklist-based testing. They are good at finding defects the specification never mentioned. Strong testers use specification techniques for coverage and experience techniques to fill the gaps.
24
Write test cases for a calculator app.
Show answer
Basic operations, division by zero, decimals, large numbers, order of operations, clear and backspace, repeated operations and memory keys.
25
Search works fine in QA but is very slow in production. Could a missing database index be the reason, and how do you check?
Show answer
Yes, very likely. An index lets the database find rows quickly, like the index of a book. With a small QA table, a full table scan is still fast, but with millions of production rows it becomes slow. Compare indexes on the searched columns in both environments and ask a developer to check the query plan. Test key queries on production-size data in staging, and include data volume in future performance checks.
26
What is recovery testing?
Show answer
Recovery testing checks how well the system recovers from crashes, hardware failures, network loss or other failures. For example, kill the server during a file upload, or disconnect the network during payment, and verify the system restores a consistent state, does not lose or duplicate data and resumes or shows a clear message. It also measures recovery time against agreed targets, which matters for banking and healthcare systems.
27
What is Appium at a high level?
Show answer
Appium is an open-source tool for automating native, hybrid and mobile web apps on Android and iOS using the WebDriver protocol. Tests can be written in Java, Python, JavaScript and other languages, and it uses platform drivers such as UiAutomator2 for Android and XCUITest for iOS. It can run on emulators, simulators, real devices and cloud device farms. Stable accessibility IDs make the best locators for it.
28
How can you do basic performance checks with browser developer tools?
Show answer
Open developer tools and use the network tab with cache disabled to see each request's size and time, and the total load time. Look for very large images or scripts, slow API calls and requests that fail or repeat. Use throttling to simulate slow 3G or 4G. Run the built-in performance audit tool to get scores for load speed and suggestions. Record the numbers so you can compare with later builds.
29
How do you test app permissions such as camera, location and contacts?
Show answer
Check that the app asks for permission only when the feature is used, with a clear reason. Test allow, deny, and deny with do not ask again. When denied, the app must not crash and should explain how to enable it in settings. Revoke permission from settings while the app is in background and return. Test allow only once or only while using the app options on newer OS versions.
30
What is a performance bottleneck and where do bottlenecks usually occur?
Show answer
A bottleneck is the component that limits the whole system's performance, so adding load beyond it increases response times or errors. Common places are slow database queries or missing indexes, too few database connections or threads, CPU or memory limits on servers, slow third-party APIs, large uncompressed files and chatty code that makes many small calls. Monitoring each layer during a test shows which resource saturates first.
31
The developer says "it's not a bug". What do you do?
Show answer
Re-check the requirement, reproduce with clear steps and evidence (screenshots, logs), discuss with the BA/PO and record the final decision.
32
An automated test passes on your laptop but fails in the CI pipeline. How do you troubleshoot?
Show answer
Check the CI logs, screenshots, video or trace to see exactly where it failed. Then compare the environments: headless versus headed browser, screen size, browser version, time zone, environment URLs and secrets, test data and network speed. Run the test locally in headless mode with the CI settings. Common causes are timing, missing data in the CI environment and tests depending on run order. Fix the cause, not with a sleep.
33
Your team wants to copy production data into the QA environment for realistic testing. What do you advise?
Show answer
Do not copy raw production data into test environments. Use synthetic data generated for the test cases, or masked production data where names, phone numbers, emails, ID numbers and card details are replaced while formats and relationships are kept. Restrict access to test databases and record the data rules in the test plan. This keeps testing realistic and follows India's data protection law and company policy.
34
What is TDD vs BDD?
Show answer
TDD writes unit tests before code to drive design; BDD describes behaviour in business language scenarios that become automated acceptance tests.
35
How do you capture screenshots, videos and traces when an automated test fails?
Show answer
Most frameworks support this through configuration. In Playwright, set screenshot to only-on-failure, video to retain-on-failure and trace to on-first-retry in the config, then open the trace viewer to step through actions, network calls and the page state. In Selenium, call save_screenshot in a teardown hook when a test fails. Store these artefacts in CI so anyone can debug the failure without rerunning it.
36
How do you test an application when requirements change frequently?
Show answer
Keep tests modular, prioritise by risk, use exploratory testing, automate stable parts and keep close contact with product owners.
Companies with offices in Delhi (2)
Frequently asked questions
Which companies hire Software Testing professionals in Delhi?
Companies with large offices in Delhi include Samsung, Boston Consulting Group. Use their company pages below to practise employer-specific sets.
Are Software Testing interviews in Delhi different from other cities?
The questions depend more on the company than the city. Delhi's mix of employers decides the style: Delhi itself hosts many corporate, government-tech and consulting offices, and most candidates also apply across Noida and Gurgaon, so interviews here mix service-company and product-company styles
How do I find Software Testing jobs in Delhi?
Shortlist companies with Delhi offices, keep your CV focused on Software Testing projects, apply on company career pages and job portals with the Delhi filter, and practise the questions on this page before each interview.
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